/**
 * #      1405
 * 名称   最长快乐字符串
 * 链接   https://leetcode-cn.com/problems/longest-happy-string
 * 题解   [114](https://leetcode-cn.com/problems/longest-happy-string/solution)
 * 通过率 49.8%
 * 难道   中等
 */

